This statement needs some qualification. It often requires time to learn accurately what our senses do testify, and sometimes the apparent experience of the senses proves incorrect. For example, to one just restored to sight, every object seems to touch the eye, and distances are learned only by experience. So the sun and stars seem to move, when it is the earth that is turning. So, also, the senses are sometimes diseased or disordered, and make false reports. The true meaning, then, of the above intuitive truth is, that when men know that they have had all requisite experience, and understand properly all the circumstances of the case, they can not help believing the evidence of their senses, and when this belief is lost, a person is regarded as insane. The ninth intuitive truth is, that WHENEVER THERE IS A CHANGE IN THE ESTABLISHED ORDER OF NATURE SURPASSING HUMAN POWER, IT IS EVIDENCE OF A SUPERNATURAL AGENCY THAT IS SANCTIONED BY THE AUTHOR OF THE LAWS OF NATURE. The conviction of the wisdom and power of the Author of this vast and wonderful frame around us is such that whatever changes may occur in its established order must be felt to be by his permission. To illustrate this, suppose a man appeared claiming to be a teacher sent from God. In proof of this, he commands a mountain to be uptorn and thrown into the sea. Now, if this phenomenon should follow his command, it would be impossible for any who witnessed it to refrain from believing that the Author of Nature performed this miracle to attest the authority of his messenger. In order to insure this belief in the interference of Deity, there must be full evidence that there can be no deception, and that the miraculous performance is entirely beyond human power and skill. Men always talk and act on the assumption that _such_ miracles are from God, and that all rational minds so regard them. The tenth intuitive truth is, that IN ALL PRACTICAL CONCERNS WE ARE TO CONSIDER THAT COURSE RIGHT WHICH HAS THE BALANCE OF EVIDENCE IN ITS FAVOR. There are few practical questions where we can have perfect certainty as to the right course. In almost all the concerns of life men are guided by _probabilities_. It is not certain that seed will spring up, or that a ship will return, or that a given medicine will cure, or that any future project will succeed; but men go forward in their pursuits with exactly the same decision as if the probabilities that guide them were certainties. They find which course has _the most_ evidence in its favor, and then act as if it was certain that this was the right course to attain their designs. And if any person should habitually act as if he believed the reverse, he would be regarded as having lost his reason. The eleventh intuitive truth is, that NOTHING IS TO BE ASSUMED AS TRUE UNLESS THERE IS SOME EVIDENCE THAT IT IS SO.